Ncert Exemplar Class 10 Maths Solutions Ch 3 Roblox,Day Boat Sailing Dinghy Language,Small Powerboat Used For Towing Water Skiers Review - Videos Download
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Question 3 For which values of a and b will the following pair of linear equations have infinitely many solutions? Hence, required values of a and b are 3 and 1 respectively for which the given pair of linear equations has infinitely many solutions. Check whether the paths cross each other or not.
Hence, two straight paths represented by the given equations never cross each other, because they are parallel to each other. How many such pairs can you write? Hence, infinitely many pairs of linear equations are possible.
Question 8 Find the values of x and y in the following rectangle see figure. Solution: By property of rectangle, Lengths are equal i. Question 11 By the graphical method, find whether the following pair of equations are consistent or not. If consistent, solve them. Hence, given pair of linear equations are consistent. Therefore, it has no solution. So, the given pair of lines is inconsistent.
Therefore, these lines have infinitely many solutions. Hence, the given pair of linear equations are consistent. We observe that the lines represented by i and ii are coincident.
Write the vertices of the triangle formed by these lines and the y-axis. Also, find the area of this triangle? How many such lines can we find? Therefore, the pair of equations has a unique solution. Hence, these equations are consistent. Find x and y. Question 16 Two years ago, Salim was thrice as old as his daughter and six years later, he will be four years older than twice her age. How old are they now? Now, by first condition, Two years ago, Salim was thrice as old as his daughter.
Question 17 The age of the father is twice the sum of the ages of his two children. After 20 years, his age will be equal to the sum of the Ncert Exemplar Class 10 Maths Solutions Ch 8 Roblox ages of his children. Find the age of the father. Solution: Let the present age in year of father and his two children be x, y and z years, respectively.
Question 18 Two number are in the ratio 5 : 6, If 8 is subtracted from each of the numbers, the ratio becomes 4 : 5. Find the numbers. Solution: Let the two numbers be x and y. Question 19 There are some students in the two examination halls A and B.
To make the number of students equal in each hall, 10 students are sent from A to 8. But if 20 students are sent from B to A, the number of students in A becomes double the number of students in B.
Find the number of students in the two halls. Solution: Let the number of students in halls A and B are x and y respectively. Question 20 A shopkeeper gives books on rent for reading. She takes a fixed charge for the first two days, and an additional charge for each day thereafter. Find the fixed charges and the charge for each extra day.
Jayanti answered questions and got 90 marks. How many questions did she answer correctly? Solution: Let the number of correct answers be x then the number of wrong answers be � x Then, by given condition, Hence, Jayanti answered correctly questions. Find x and y and hence the values of the four angles. Also find the area of the quadrilateral formed by the lines and the x-axis. Now, from the graph ABCD is the quadrilateral formed by given lines and x � axis.
Form the pair of linear equations for the above situation. Find the cost of a pen and a pencil box. This guide will help you to cover all the important portions of Class 10 Maths Chapter 3 Exercise 3.
Below are the important sections of the chapter:. The algebraic method for solving linear equations. Reducing equations to linear equations in two variables.
Problems on linear equations like find the value of Ncert Exemplar Class 10 Maths Solutions Ch 3 Net two variables as given in Exercise 3. In Class 10 Maths Exercise 3. From the 1 st equation, we get,. Now, by substituting the value of x with y , in second equation, we get -.
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